Facts about Hesperornis, an extinct prehistoric animal

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Dinosaur Jungle   >   Other Prehistoric Animals   >   Hesperornis

Hesperornis



Scientific Classification
  Kingdom Animalia
  Phylum Chordata
  Class Aves
  Subclass Hesperornithes
  Order Hesperornithiformes
  Family Hesperornithidae
  Genus Hesperornis
Hesperornis is an extinct genus of birds that lived during the late Cretaceous period between about 89 million and 65 million years ago.

Hesperornis were flightless and aquatic. They were large, growing to about 6½ feet (2 meters) in length. Their wings were greatly reduced, and instead they swam using their powerful hind legs (its legs were in fact so widely splayed out that, Hersperornis may not have been able to stand or walk on land). Their beaks were equipped with teeth, which would have helped them with holding on to fish, as well as dealing with hard-shelled prey such as molluscs and crustaceans.

Hesperornis fossils were first found by Othniel C. Marsh, who also named the genus in 1872. Fossils of these birds are particularly found in Kansas in the United States, and also in Canada, however it is thought likely that they were quite widespread throughout the Northern hemisphere.

Hesperornis

Hesperornis Timeline:



Hesperornis were marine birds that lived between 89 and 65 million years ago

Hesperornis were marine birds that lived between 89 and 65 million years ago


Related Information & Resources


See Also

Hesperornis Books


Here are some books from Amazon.com:

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Hesperornis (German Edition)
By Ernst Probst

GRIN Publishing
Paperback (84 pages)

Hesperornis (German Edition)
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Fachbuch aus dem Jahr 2014 im Fachbereich Geowissenschaften / Geographie - Paläontologie, , Sprache: Deutsch, Abstract: Ein Vogel, der nicht mehr fliegen, dafür aber gut schwimmen und tauchen konnte, steht im Mittelpunkt des Taschenbuches „Hesperornis - Der große Vogel des Westens". Dieser von der Schnabelspitze bis zum Fußende bis zu 1,80 Meter lange Tauchvogel lebte in der Oberkreidezeit vor etwa 83,5 bis 78 Millionen Jahren an einem Flachmeer, das Nordamerika von Norden nach Süden durchzog. Er war ein Zeitgenosse von Flugsauriern, Meeressauriern und Dinosauriern, die damals die Lüfte, das Meer und das Land bevölkerten. Wie der Urvogel Archaeopteryx aus der Oberjurazeit vor rund 150 Millionen Jahren in Bayern trug auch Hesperornis noch Zähne im Schnabel. Die Entdeckung von Hesperornis fällt in die Zeit der legendären „Knochenkriege" bzw. „Knochenschlachten" zwischen den amerikanischen Paläontologen Othniel Charles Marsh (1831-1899) und Edward Drinker Cope (1840-1897). Jene beiden Wissenschaftler lieferten sich etwa drei Jahrzehnte lang einen erbitterten Wettstreit um möglichst viele Dinosaurier-Funde in den USA. Verfasser des Taschenbuches „Hesperornis - Der große Vogel des Westens" ist der Wiesbadener Wissenschaftsautor Ernst Probst, der zahlreiche Werke über urzeitliche Tiere geschrieben hat.
Notes on the Osteology and Relationship of the Fossil Birds of the Genera Hesperornis Hargeria Baptornis and Diatryma (Classic Reprint)
By Frederic A. Lucas

Forgotten Books
Paperback (20 pages)

Notes on the Osteology and Relationship of the Fossil Birds of the Genera Hesperornis Hargeria Baptornis and Diatryma (Classic Reprint)
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Excerpt from Notes on the Osteology and Relationship of the Fossil Birds of the Genera Hesperornis Hargeria Baptornis and Diatryma

This would throw the center of effort farther forward in the old diving birds than in modern species, and mav be due to the use of the muscles either while capturing fish or in moving about on land.

The synsacrum seems to have comprised ten vertebrae, but this is not certain, the first of which belongs to the dorsal series and bore a rib. The sacrum of Hesperornis contained fourteen vertebrae. N oth ing of the pelvis is present save the anterior portion of an ilium, and this, although weathered, resembles the corresponding portion of the ilium of Hesperornis. The dorsal vertebrae were all free, and so were the ossa innominata in both Baptornis and Hesperornis, but this free dom is to be regarded as due to the aquatic habits of these birds and not as morphological characters. While the bones of aquatic animals are heavier than are those of land animals, ossification and union between contiguous parts takes place much more slowly, and in such strictly aquatic birds as the penguin and great auk the dorsal vertebrae and ossa innominata are similarly free.

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Dinosaur Slayers by the Shore (Dinosaurs Rule)
By Paul Mason

Hungry Tomato ®
Released: 2018-08-01
Kindle Edition (32 pages)

Dinosaur Slayers by the Shore (Dinosaurs Rule)
 
Product Description:

Explore the unique world of dinosaurs in coastal habitats. Spread-by-spread match-ups pit different dinosaur species against one another in battles that are scientifically accurate. Fact files give report writers all the info they need at a glance.

Vogelriesen in der Urzeit: Rekorde gefiederter Giganten (German Edition)
By Ernst Probst

GRIN Verlag
Released: 2014-09-29
Kindle Edition (300 pages)

Vogelriesen in der Urzeit: Rekorde gefiederter Giganten (German Edition)
 
Product Description:
Fachbuch aus dem Jahr 2014 im Fachbereich Geowissenschaften / Geographie - Paläontologie, , Sprache: Deutsch, Abstract: Gefiederte Giganten stehen im Mittelpunkt des Taschenbuches „Vogelriesen in der Urzeit“. Weibliche Tiere der Gattung Dinornis („Schreckensvogel“) auf Neuseeland gelten mit einer Höhe bis zu 3,60 Metern als größte Vögel aller Zeiten. Der Donnervogel Dromornis in Australien erreichte ein Lebendgewicht von maximal 570 Kilogramm und war deswegen der schwerste Vogel der Erdgeschichte. Mit einer Flügelspannweite bis zu 8 Metern gebührt dem Greifvogel Argentavis aus Argentinien die Ehre, der größte fliegende Vogel gewesen zu sein. Nicht ganz so imposant wirkte der größte Meeresvogel Pelagornis in Nordamerika mit einer Flügelspannweite von 6,40 Metern. Die größten Eier legte der weibliche Elefantenvogel Aepyornis auf Madagaskar: Sie waren bis zu 35 Zentimeter lang und ihr Inhalt entsprach demjenigen von 200 heutigen Hühnereiern. Hesperornis, der „Vogel des Westens“ in Nordamerika, trug noch Zähne. Angst und Schrecken verbreitete der Terrorvogel Phorusrhacos in Südamerika. Der lange Zeit als Räuber verkannte Laufvogel Gastornis existierte auch in Deutschland. Verfasser des Taschenbuches „Vogelriesen in der Urzeit“ ist der Wiesbadener Wissenschaftsautor Ernst Probst, der zahlreiche Werke über urzeitliche Tiere geschrieben hat.
A SKELETON OF HESPERORNIS
By F.A. Lucas

Smithson.Misc.Collect.v.1,pt.1
Paperback
 
The Jaws of the Cretaceous Toothed Birds, Ichthyornis and Hesperornis
By Joseph T. Gregory

The Condor
Paperback
 
Product Description:
Reprinted from "The Condor", Volume 54, March-April, 1952, Number 2.


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